Dresden 2017 – scientific programme
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DF: Fachverband Dielektrische Festkörper
DF 9: Poster Session
DF 9.5: Poster
Tuesday, March 21, 2017, 14:00–16:00, P1C
Rogue wave generation due to inelastic quasi-soliton collisions in optical fibers — •rudolf a. roemer1, antonino savojardo1, marc eberhard2, and akihiro maruta3 — 1Department of Physics, The University of Warwick, United Kingdom — 2School of Engineering and Applied Science, Aston University, United Kingdom — 3Graduate School of Engineering, Osaka University, Japan
Optical rogue waves (RW) are rare and extremely high power pulses. Experimental results in optical fibers and numerical data suggest that these giant waves are due to at least two mechanisms of amplification, modulation instability, which leads to the creation of quasi-solitons, and multiple inelastic quasi-soliton collisions. Based on statistics from more than 17× 106 quasi-soliton collisions, we establish unambiguously the fat-tail character of the probability distribution function (PDF). We also investigate single pair-wise inelastic quasi-soliton collisions and describe the energy transfer as a resonant-like scattering processes. This allows us to implement a novel cascade model that simulates the RW generation process directly giving quantitative agreement with a full numerical integration of the non-linear Schroedinger equation (gNLSE). This highlights the importance of quasi-soliton energy exchange in giving rise to RWs. Time series analysis for the gNLSE and the cascade model show calm before the storm behavior a few picoseconds before they pass. Surprisingly the cascade model predicts such signature with the only assumption of energy transfer between quasi-solitons, not further ingredients are needed.